Collin Mar, MD
NPI 1538247622 · Diagnostic Radiology Physician · Walnut Creek, CA
Collin Mar, MD is a Diagnostic Radiology Physician provider in Walnut Creek, CA (NPI 1538247622).
Provider details
- NPI number
- 1538247622
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G46904 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-02
- Last updated
- 2007-07-08
Frequently asked questions
- What is Collin Mar's NPI number?
- Collin Mar's National Provider Identifier (NPI) is 1538247622, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Collin Mar's specialty?
- Collin Mar is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Collin Mar located?
- Collin Mar's practice location on file with NPPES is 1425 S Main St, Walnut Creek, CA 94596-5318.
- What is Collin Mar's phone number?
- The practice phone number listed in the NPPES registry for Collin Mar is (925) 295-4000.
- Is Collin Mar's NPI active?
- Yes — Collin Mar's NPI (1538247622) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.